Gateway Routing Support
The Gateways provide
several different methods of internally routing the data from one
address to another address. The addresses can be on any port using
any supported protocol. The assignment of each address is defined
through the Configuration Menu. Any specialized routing of the addresses
is also defined through the menus.
Static
Routing
All of the Gateways use
static routing as the default. This type of routing uses the information
in the routing table defined through the Configuration Menu to implement
the connection between addresses. The assignments stay in effect
until a new configuration file is transferred to the Gateway. The
Gateway provides the flexibility to split the address routing. For
example, the output of one address can be routed to another address
and the response can be directed to yet another address.
Selectable Routing
The selectable
routing provides additional capabilities for all of the Gateways.
This type of routing provides increased flexibility and integrity
for the Gateways by allowing data to be directed between different
addresses based upon (menu) selectable conditions. The Gateway's
dynamic routing capability consists of the following:
Routing
Type |
Description |
|
Data
received on one address can be simultaneously transmitted to
several different addresses. This capability allows data to
be duplicated for updating several systems at once. The Gateways
can convert the data to many different protocols or formats
as it is being broadcasted. |
|
Data
from several addresses to be interleaved to a single address.
One usage of this function is consolidating several serial data
streams into one TCP/IP stream. |
|
The
Gateway will maintain open connections across several addresses.
If the primary connection fails, then the Gateway will automatically
send the data to the next address defined in the Fall-Back Routing
Table. When the first address reconnects, then the Gateway will
resume the original connection routing. The Configuration Menus
allow the selection of the conditions that implement the fall-back
and recovery of the original connection. One usage of this function
is supporting several TCP/IP Servers to maintain maximum availability. |
|
Data
can be sequentially or dynamically routed to an open address
to minimize queuing delays. The data is sequentially transmitted
through a set of defined addresses. This routing allows the
data to be split between several systems. If one system is not
available, the data is automatically sent to the other available
ports. |
Several different
methods can be combined to meet an installation's unique requirements.
For example, Connection and Fall-Back can be combined so that the
fall-back addresses are defined by the Connection Routing list.
An example of multiple routing is available here.
Dynamic IP Routing
The Gateways
support RIP, OSPF and BGP routing for TCP/IP data. The support for
these routing protocols is part of the definition of the Gateway's
TCP/IP protocol stack. This type of routing uses special routing
information protocols to automatically update the routing table
with routes known by peer routers. With the correct software level
and proper configuration, the Gateway can provide IP routing and
co-exist in a network that uses these protocols. RIP, OSPF and BGP
routing are the industry-standard and supported by other vendor's
equipment.
| 
